‘Koihime Musou’

Having lost her family to bandits during night raid, Kanu swears, she will not let others share the same pain. She quickly becomes a — well-known and feared by villains — bandit hunter. During her journey she comes across others, who wish to join her cause. One of them is a girl named Rin Rin, who had a similar experience with bandits in the past.

Descriptions taken from AniDB.net